Universal joint for driving dump-car bodies



Dec. 7 1926. 1,610,074

7 c. P. ASTROM UNIVERSAL JOINT FOR DRIVING DUMP CAR BODIES Filed August 18, 1922 2 Sheets-Sheet l IN V EN TOR BY'W ATTORNEY I Dec. 7, 1926. 1,610.074

I C. P. ASTROM UN IVERSAL JOINT FOR DRIVING DUMP CAR BODIES Filed August 18, 1922 2 Sheets-Sheet 2.

25 50 29 INVENTOR ATTORNEY Patented Dec. 7, 1926.

UNI-T E D ST- AT ES PAT ENT @{F F HIE.

CARL 1. ASTROMg'OE1EAST ORZANG COMPANY, A CORPORATION new annsn'm essrenon TUM/HwTR-LEADWELL or. NEW Yon-11. 1

UNIVERSAL; Jom'rfl FOR nnrvm'e tnorrP-onn BODIES:

Applic'ation'filed A1'1gust"18;192'2. SriatNo; 582,577.

This invention relates totilting and later ally moving" (under or hot *metal dump cars and has for its object to provide means adapted toprevent strains "or breakage? of partsinevent thecarbodytrunnionsgetout of alignment With "the racks.

Alnother object isto providea dumping car having a stationary? and'a movable t jerewith, one of which the other""for "checking car body.

cylinder connected is for tilting and the movement of the c The usual form of tilting and laterally moving dump car bodyis-mounted to tilt and roll" ontmnnionealong a bye reciprocatin'gmotor. able dangerlof the rack" teeth. tracli 01'" rack teeth or cause one of track and is driven There is considerdirt, cinders; etc, getting into the trunnions to rollahead of 20 the other and" ont offaii-gnment, there is danger of'ruptnr-e in some .part' since the driving connectionbet-We'en'the motor and trunnion is not ordinarily adapted'to be moved'outofit s plane of'motion to accommodate I such misalignment this danger oif rbreak'age by the provision of av universal joint Within the driving-mem- This inventi single' dump dump to only one side instead to-those' cars on is particularly adapted to cars; that is; those adapted to having-a stationa'r driving cylindex" and EllllOVflblB'Oll cylinc or located at one'sdeofthe-drivingpiston rod for governingthe movement of the trunnion's;

this type is provi'de'd, themain' drivingpisouthavingto turn theadri'vingi member or impart any dangerous strains to it. 'in'g m mber l'ug on one bearing me'm b'erse'a'oh adapted totnrn about I an axis at 90" to the axis about which the other bearing member i'scapable of'rot-ating;

In orderto permit the driving end of the trnnnionstoberaisedor lowered the'bearing membersare 551 tilanyivernca made 51' dabl e together snbstair My within the crossheadi Fig. 5;

Shouldsuch dirt'clog the for any other reason:

The'pre'sent invention is-adapted to-remove which engages a- Y PIOjBCting 1 lug on one of the trunmon members' of both and driving piston and When a movable oil cylinder of means 1s torsional or fleXuraI- Within the crosshead or driv-- and surrounding. the" driving" otth'e trunnion's are a pair of- Referring to the drawings:

Fig. l' shows a side'view of" adumping car to" which the invention has' b'een applied;

Figi 2 is a left hand-end view oft'hedevice showingqin Fig; 1;

Figr 3 is an enlarged: plan in' motor and coupling r r Fig. 4 is a section ontl-1e line iti of view of a driv- Fig." 5; is a section; on the'line 5 h? of Fig." 41' and shows adetail plan? view ot the universal joint; and a The numeral 10 on thedrawing; indicates the underf-r'ame supported at each end on truck's 11 provided with the customary coupling equipment 1-2 and having thereon a platform 13 on which is mount'ed supports for the track rails} 14 and the rack 15'. The

dumpingcar body 18 is mounted iniiw suitable yokemember 19'suppo'rted; at eaoh end on trilnni'on's 16' which are adaptedito roll along the track14 -in tilting; Gears 17I cooperate with ventsliding. Located on'one of the platforms 13 is a support 20 tor a -fl11id'pressnre motor211 A lugi24c-proje'cts out-fromone of the trunnions a'nd is adapted to bexm'oved by themotor 21 through" the piston: 21?, piston rod 22 slidable Within the h earing 23yandi.

the crosshead 25. Bolted or otherwise secured toone side of th'e p'iston' rod and crossheadis the hydraulic cylinder 26 for retarding" the movement oft'he driving memlo'erand trunnions. havingthe moving cylinder tilled with oil and'sliding over a stationary piston. 27 and piston rod 28. By either or'both the provisio'ns of-appropriate clearance between the piston 27 andfth'e cy1inder 26 andthe use of a numher of small openings 'Within the piston 27, moveinent of the oi'l from one side of the piston to the other is necessarily slow to thus cushion the movement-'of'the' dump car body;

D116 to any number of causes, it sometimes happens that one" end' of lthe. trunnions 16' is moved up andahe'ad of the other enda-nd out of its -'usn-al--position: a t substantially right angles to the drivingpiston rod 22. It will therefore be seen that if excessive. torsional or flex-Ural strains arenot to be transmitted to the'cros'shead 25 andpiston rod22 that some means must be provided to permitthe the teeth-otthe rackl lnito preiii) This is accomplished by trunnions to be moved out of alignment. This is accomplished by the use of a universal joint within the crosshead 25 and shown by Figs. 4 and 5. Located within the crosshead are a pair of bearing members 29 and 30 one within the other and each adapted to rotate about an axis at to the axis about which the other member rotates. For purposes of illustration the bearing member 29 is shown as being made solid but it will be understood that this member may be made in several parts if desired in order to compensate for wear. In order to allow for movement of the trunnion axis in avertical plane, the bearing member 29 is mounted on pivots 31 so that this bearing member may rotate about a horizontal axis through the center of the trunnion lug 24:.

To take care of movement of the trunnion axis in a horiontal plane, the bearing member 30 is made convex on its lateral faces 32 and curved on a radius to the center of the trunnion lug 2s. The inside lateral faces of the crosshead 25 are made convex on the same radius to cooperate with the curvature given the lateral faces of the bearing member 30. Movement of the trunnion axis in a horizontal plane results in a movement of the bearing member 30 about a vertical axis through the center of the trunnion lug 24, the bearing members 29 and30 are made slidable to move within the crosshead and for this purpose appropriate clearance space 36 above and below the bearing members may be provided. In the embodiment illustrated the crosshead is made U-shaped and provided with a bridging member 33 across the top and secured by shoulders 3a to limit the Vertical movement of the bearing menr' bers 29 and 30.

hat I claim is:

1. The combination in a dumping car with a tilting and laterally moving car body, of trunnions on which the same is mounted, a

laterally extending driving member connected to a trunnion for dumping said car body,

a motor for actuating the driving member, and a universal joint connected to said drivmember and located between said trunnion and i'ncmber for permitting rotation or" the trunnion axis without interruption of or disconnection in said universal joint.

2. The combination in a dumping car with a tilting and laterally moving car body, of trunnions on which the same is mounted, a laterally extending driving member connected to a trunnion for dumping said car body, a motor for actuating the driving member, and universal joint connected to said driving member and located between the motor and trunnion for permitting rotation of the trunnion axis without interruption of or disconnection in said universal joint.

3. The combination with a dump car body of trunnions on which the car is mounted, a track along which the trunnions may roll, a stationary fluid pressure cylinder, piston and piston rod for moving the trunnions, a crosshead between said piston rod and trunnions, a movable hydraulic cylinder at one side of and connected with said piston rod for governing the movement of said car body, a stationary piston within said movable cylinder and a universal connection between said crosshead and trunnions.

t. A dump car body mounted 011 trunnions, a track along which the trunnions are adapted to roll, a reciprocal driving member for moving the trunnions and a universal joint between said driving member and trunnions and comprising a pair of bearingmenr bers,one within the other and adaptedfor rotation about axes at right angles.

5. The combination with a dump car body, of a trunnion supporting the same, a reciprocable member for rotating said car body on said trunnion, a cross-head connecting said member and trunnion, and a movable checking cylinder secured to said cross-head on one side thereof, a stationary piston rod and piston inside said checking cylinder, and a stationary motor cylinder located at one end of the checking cylinder.

6. The combination with a dump car bod mounted on trunnions, of a track along which the trunnions are adaptedto roll, a reciprocal driving member for moving the trunnions and a universal joint between said driving member and trunnions and comprising a pair of bearing members, one within the other, a projecting lug on a trunnion adapted to extend within the driving and within the hearing members, one of said bearing members b ing in cooperation with the lug and being substantially horizontally pivoted tothe outer bearing member both bearing members being Slidable substantially vertically within the driving member and the outer bearing member being rotatable about a substantially vertical axis through the center of the trunnion lug.

7. The combination with a dump car body, of a trunnion supporting the same, reciprocable piston rod for rotating said car body on said trunnion, a stationary motor cylinder with a movable piston alined with said piston rod for driving the same, a movable checking cylinder located at one side of and close to said piston rod with its end spaced from the adj acentend of the motor cylinder.

8. The combination in a dumping car with a tilting and laterally moving car body, of trunnions on which the same is mounted, a

for single dumpin laterally extending driving member con nected to a trunnion for dumping said car body, a universal joint between said driving member and trunnion, and guidewaysconnected to said universal joint and inwhich any vertical movement between the trunnion and driving member occurs.

9. The combination in a dumping car with a tilting and laterally movable car body of trunnions on Whichthe same is mounted, a motor for tilting said our body, a laterally extending driving member between the motor and u trunnion, a cross head connecting said driving member and trunnion, and a universal joint within said cross head.

, Signed at New York in the county of New York and State of New York this 11th day of August A. D. 1922.

CARL P. ASTROM. 

